Just how effective are 'free shipping' emails?

There’s a reason consumers are flooded with emails offering two-for-one discounts, free shipping, and 30 percent off—research suggests the deals work, perhaps even better than intended. 

To understand the eurozone crisis, consider culture

The expanding political and fiscal union in Europe, motivated by a desire not to repeat the mistakes leading to the two world wars, rests on centuries of interrelated but distinct national beliefs, values, desires, and morals—factors that lie at the foundation of economic practices.